Patent US3557787A successfully refreshed from Google Patents.
US3557787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable syringe
Assignee: Individual
•
Filing: 1968-05-28
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Granted: 1971-01-26
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Expires: 1988-05-28
Abstract
Abstract A syringe device formed of inner and outer tubular members with the inner member adapted to be telescoped within the outer member and sealed therefrom by a resilient, thin seal. The inner member has a planar flange surface on its forward end and across which the thin seal extends. The thin seal has passage means therethrough in sealing relation to the flange surface. The outer member is formed with a rupturable seal having an injection needle in alignment therewith for rupture in use with the inner tubular member. The inner member is adapted to contain a liquid carrier and the outer tubular member a dry medicant to be taken up with the carrier for injection whereby the materials are freshly mixed immediately prior to injection for operation of the device.
Inventors
- 👤 Milton J Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:04
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/28; A61M5/284; A61M5/31; A61M5/315; A61M5/31596; A61M5/32; A61M5/34; A61M5/285; A61M5/286; A61M5/288; A61M5/31598
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
236 words
A syringe assembly for injection comprising inner and outer tubular members with the inner members having an outer wall to wall dimension less than the inner wall to wall dimension of the outer tubular member to enable the inner tubular member to be telescoped within the outer tubular member, said inner tubular member defining a planar flange surface on the forward end thereof, a rupturable closure sealing the forward end of the outer tubular member, a flexible closure having a resilient, thin web means across said flange surface and sealing the forward end of the inner tubular member, said thin web means including passage means therethrough seated on said flange surface in sealing relation thereto whereby said passage means are unseated to communicate with the interior of the inner tubular member in response to internal pressure therein, a piston ring portion on the forward end of the inner tubular member in sliding engagement with the inner walls of the outer tubular member, a piston plug dimensioned slidably to be received within the inner tubular member, and means for actuating the piston plug axially relative to the inner tubular member, a hypodermic needle, and collapsible means on the forward end portion of the outer tubular member supporting the needle with the rearward end terminating a short distance in advance of the rupturable closure when in uncollapsed position and penetrating through the rupturable closure when in collapsed position.
Claim 2
Dependent Claim
236 words
A syringe assembly for injection comprising inner and outer tubular members with the inner members having an outer wall to wall dimension less than the inner wall to wall dimension of the outer tubular member to enable the inner tubular member to be telescoped within the outer tubular member, said inner tubular member defining a planar flange surface on the forward end thereof, a rupturable closure sealing the forward end of the outer tubular member, a flexible closure having a resilient, thin web means across said flange surface and sealing the forward end of the inner tubular member, said thin web means including passage means therethrough seated on said flange surface in sealing relation thereto whereby said passage means are unseated to communicate with the interior of the inner tubular member in response to internal pressure therein, a piston ring portion on the forward end of the inner tubular member in sliding engagement with the inner walls of the outer tubular member, a piston plug dimensioned slidably to be received within the inner tubular member, and means for actuating the piston plug axially relative to the inner tubular member, a hypodermic needle, and collapsible means on the forward end portion of the outer tubular member supporting the needle with the rearward end terminating a short distance in advance of the rupturable closure when in uncollapsed position and penetrating through the rupturable closure when in collapsed position.
Claim 3
Dependent Claim
15 words
A syringe as claimed in claim 1 which includes a removable cover for the needle.
Claim 4
Dependent Claim
71 words
A syringe as claimed in claim 1 in which the inner tubular member is adapted to contain a liquid carrier and in which the outer tubular member is adapted to contain a dry material to be taken up by the liquid carrier when the latter is forced from the inner tubular member into the outer tubular member in response to movement of the piston plug axially in the inner tubular member.
Claim 5
Dependent Claim
62 words
A syringe as claimed in claim 1 in which the collapsible means comprises a hub member secured at its rearward end portion onto the forward end of the outer tubular member and a forward end having an opening through which the needle extends with a flexible portion between the ends to enable displacement of the forward end between normal and collapsed position.
Claim 6
Dependent Claim
54 words
A syringe as claimed in claim 1 in which the piston ring portion on the forward end of the inner tubular member comprises ring members of rubberlike material in sealing engagement with the outer walls of the inner tubular member and extending into sealing engagement with the inner walls of the outer tubular member.
Claim 7
Dependent Claim
65 words
A syringe as claimed in claim 1 in which the piston ring portion and flexible closure are of a unitary construction mounted onto the forward end portion of the inner tubular member and in which the means in the flexible sealing closure comprises openings extending through the sealing member in a position offset outwardly from axial alignment with the passage through the inner tubular member.
Claim 8
Dependent Claim
40 words
A syringe as claimed in claim 1 in which the piston plug within the inner tubular member is formed of rubberlike material having circular ribs dimensioned to extend into sealing engagement with the inner walls of the inner tubular member.
Claim 9
Dependent Claim
45 words
A syringe as claimed in claim 1 which includes means on the rearward end of the piston plug for attachment of an actuator and which includes an elongate actuator dimensioned to exceed the length of travel of the piston plug through the inner tubular member.
Claim 10
Dependent Claim
39 words
A syringe as claimed in claim 8 in which the actuator comprises an elongate rod dimensioned to be received in telescoping relation within the inner tubular member and with means for attachment of the actuator to the piston plug.
Claim 11
Dependent Claim
31 words
A syringe as claimed in claim 1 which includes flanged members extending radially outwardly from the rearward end portions of the inner and outer tubular members for use as finger grips.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |